lmms/include/AutomationEditor.h

/*
 * AutomationEditor.h - declaration of class AutomationEditor which is a window
 *                      where you can edit dynamic values in an easy way
 *
 * Copyright (c) 2006-2008 Javier Serrano Polo <jasp00/at/users.sourceforge.net>
 * 
 * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program (see COPYING); if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 */

#ifndef _AUTOMATION_EDITOR_H
#define _AUTOMATION_EDITOR_H

#include <QtCore/QMutex>
#include <QtGui/QWidget>

#include "lmms_basics.h"
#include "JournallingObject.h"
#include "MidiTime.h"
#include "AutomationPattern.h"
#include "ComboBoxModel.h"
#include "knob.h"


class QPainter;
class QPixmap;
class QScrollBar;

class comboBox;
class NotePlayHandle;
class timeLine;
class toolButton;


class AutomationEditor : public QWidget, public JournallingObject
{
	Q_OBJECT
public:
	void setCurrentPattern( AutomationPattern * _new_pattern );

	inline const AutomationPattern * currentPattern() const
	{
		return( m_pattern );
	}

	inline bool validPattern() const
	{
		return( m_pattern != NULL );
	}

	int quantization() const;


	virtual void saveSettings( QDomDocument & _doc, QDomElement & _parent );
	virtual void loadSettings( const QDomElement & _this );
	inline virtual QString nodeName() const
	{
		return( "automationeditor" );
	}

	void setPauseIcon( bool pause );


public slots:
	void update();
	void updateAfterPatternChange();


protected:
	typedef AutomationPattern::timeMap timeMap;

	virtual void closeEvent( QCloseEvent * _ce );
	virtual void keyPressEvent( QKeyEvent * _ke );
	virtual void leaveEvent( QEvent * _e );
	virtual void mousePressEvent( QMouseEvent * _me );
	virtual void mouseReleaseEvent( QMouseEvent * _me );
	virtual void mouseMoveEvent( QMouseEvent * _me );
	virtual void paintEvent( QPaintEvent * _pe );
	virtual void resizeEvent( QResizeEvent * _re );
	virtual void wheelEvent( QWheelEvent * _we );

	float getLevel( int _y );
	int xCoordOfTick( int _tick );
	int yCoordOfLevel( float _level );
	inline void drawLevelTick( QPainter & _p, int _tick,
					float _value, bool _is_selected );
	void removeSelection();
	void selectAll();
	void getSelectedValues( timeMap & _selected_values );

	void drawLine( int x0, float y0, int x1, float y1 );
	void disableTensionKnob();

protected slots:
	void play();
	void stop();

	void horScrolled( int _new_pos );
	void verScrolled( int _new_pos );

	void drawButtonToggled();
	void eraseButtonToggled();
	void selectButtonToggled();
	void moveButtonToggled();

	void discreteButtonToggled();
	void linearButtonToggled();
	void cubicHermiteButtonToggled();
	void tensionChanged();

	void copySelectedValues();
	void cutSelectedValues();
	void pasteValues();
	void deleteSelectedValues();

	void updatePosition( const MidiTime & _t );

	void zoomingXChanged();
	void zoomingYChanged();


private:

	enum editModes
	{
		DRAW,
		ERASE,
		SELECT,
		MOVE
	} ;

	enum actions
	{
		NONE,
		MOVE_VALUE,
		SELECT_VALUES,
		MOVE_SELECTION
	} ;

	// some constants...
	static const int INITIAL_WIDTH = 860;
	static const int INITIAL_HEIGHT = 480;

	static const int SCROLLBAR_SIZE = 16;
	static const int TOP_MARGIN = 48;

	static const int DEFAULT_Y_DELTA = 6;
	static const int DEFAULT_STEPS_PER_TACT = 16;
	static const int DEFAULT_PPT = 12 * DEFAULT_STEPS_PER_TACT;

	static const int VALUES_WIDTH = 64;

	AutomationEditor();
	AutomationEditor( const AutomationEditor & );
	virtual ~AutomationEditor();


	static QPixmap * s_toolDraw;
	static QPixmap * s_toolErase;
	static QPixmap * s_toolSelect;
	static QPixmap * s_toolMove;


	QWidget * m_toolBar;

	toolButton * m_playButton;
	toolButton * m_stopButton;

	toolButton * m_drawButton;
	toolButton * m_eraseButton;
	toolButton * m_selectButton;
	toolButton * m_moveButton;

	toolButton * m_discreteButton;
	toolButton * m_linearButton;
	toolButton * m_cubicHermiteButton;
	knob * m_tensionKnob;
	FloatModel * m_tensionModel;

	toolButton * m_cutButton;
	toolButton * m_copyButton;
	toolButton * m_pasteButton;

	comboBox * m_zoomingXComboBox;
	comboBox * m_zoomingYComboBox;
	comboBox * m_quantizeComboBox;

	ComboBoxModel m_zoomingXModel;
	ComboBoxModel m_zoomingYModel;
	ComboBoxModel m_quantizeModel;

	QMutex m_patternMutex;
	AutomationPattern * m_pattern;
	float m_minLevel;
	float m_maxLevel;
	float m_step;
	float m_scrollLevel;
	float m_bottomLevel;
	float m_topLevel;

	void updateTopBottomLevels();

	QScrollBar * m_leftRightScroll;
	QScrollBar * m_topBottomScroll;

	MidiTime m_currentPosition;

	actions m_action;

	tick_t m_selectStartTick;
	tick_t m_selectedTick;
	float m_selectStartLevel;
	float m_selectedLevels;

	float m_moveStartLevel;
	tick_t m_moveStartTick;
	int m_moveXOffset;

	float m_drawLastLevel;
	tick_t m_drawLastTick;

	int m_ppt;
	int m_y_delta;
	bool m_y_auto;

	timeMap m_valuesToCopy;
	timeMap m_selValuesForMove;


	editModes m_editMode;


	timeLine * m_timeLine;
	bool m_scrollBack;

	void drawCross( QPainter & _p );
	void drawAutomationPoint( QPainter & p, timeMap::iterator it );
	bool inBBEditor();



	friend class engine;


signals:
	void currentPatternChanged();
	void positionChanged( const MidiTime & );

} ;


#endif